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ARC ELASTICITY: The average elasticity for discrete changes in two variables, A and B. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of the initial and ending values of each variable, rather than only initial values. Arc elasticity is generally calculated using the midpoint formula. Arc elasticity should be compared with point elasticity. For infinitesimally small changes in variables A and B, arc elasticity is the same as point elasticity.
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INCOME EFFECT The change in quantity demanded that results because a change in the demand price of a good affects real income (that is, the purchasing power of income) even though nominal income remains the same. This is one of two reasons, or effects, underlying the law of demand and the negative slope of the market demand curve. The other is the substitution effect.
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BROWN PRAGMATOX
[What's This?]
Today, you are likely to spend a great deal of time looking for a downtown retail store trying to buy either a wall poster commemorating the first day of winter or blue cotton balls. Be on the lookout for celebrities who speak directly to you through your television.
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The average bank teller loses about $250 every year.
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"One person with a belief is equal to a force of ninety-nine with only interests." -- John Stuart Mill
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CPI-U
Consumer Price Index-All Urban Consumers
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